The disadvantage of multiple file compression is that you need to decompress everything, even if you only need one file.
The unknown compression method used in this file is not specified or identified.
Compressing files or images enables you to (sometimes dramatically) decrease the memory space that file will take up. Without going into to too much detail, it works by 'approximating' the information in the file, thereby lowering the detail and filespace. However, compression also reduces the quality of the file, possibly corrupting it if it is compressed too much!
There are many programs that will do relatively the same thing. Some more known than others, and some for certain file formats. Because there are many file formats (.zip, .rar, .gz, .arj, .cab, etc....) sometimes you may need a specific utility for a format. The most common are .zip and .rar, but they are not necessarily the best.
it would be 2mb due to compression programs.
Lossless compression results in a closer representation of the original media, and thus a higher quality end product. The disadvantage is that the resulting file will be larger than if you had used a lossy compression format. Lossy compression can give you a smaller file size, but the resulting end product may be in some ways inferior to the original.
File Compression
I think answer is File Compression
Compression ratio in engineering can be calculated by dividing the total volume of a system before compression by the total volume after compression. In computing, file compression ratios are calculated by comparing the original file size to the compressed file size.
There are many pieces of software that can test the quality of a file compression software. The file compression software itself can give a percentage of compression, as well as a verification of whether it is compressed properly. One can also check the 'checksum' of the file.
The unknown compression method used in this file is not specified or identified.
Compression ratio simply means the difference in size of the original vs compressed unit. Compression ratio is a commonly used term for internal combustion engine piston/cylinder compression and file compression. Ratios differ depending on the type of engine or the type of file being compressed. In file compression, 7zip has the highest compression ratio.
File compression
decrement in file size.........
There are a ton. Most things that use wavelets to encode the data fall into this category. Often the same file format and "extension" can have multiple actual encoding mechanisms on the inside, so it might sometimes have lossy compression and sometimes not. Examples of file formats with lossy compression include mp3,jpeg and mpeg. Container formats like avi, and wma sometimes do and sometimes don't.
Anup Debnath.
WinZip
Compressing files or images enables you to (sometimes dramatically) decrease the memory space that file will take up. Without going into to too much detail, it works by 'approximating' the information in the file, thereby lowering the detail and filespace. However, compression also reduces the quality of the file, possibly corrupting it if it is compressed too much!